Table 1 Indicators of exergy efficiency for sustainable agriculture (adapted from [25])
Indicators | Implication | Equation | Trend |
|---|---|---|---|
RI | Renewability Index | RI = (RR/(RR + NR + PN)) | ✓ |
ELI | Environmental loading of investment | ELI = (PN/(RR + NR)) | X |
IYR | Investment-yield ratio | IYR = PN/Y | X |
ERYR | Ecosystem resource-yield ratio | ERYR = ((RR + NR)/Y) | ✓ |
STr | System transformity | STr = (RR + NR + PN)/Y | X |
NRYR | Non-renewable yield ratio | NRYR = (NR + PN)/Y | X |